jot: make DOU format strings behave like ld, lo, lu

[Theo Buehler]

The printf(3) manual says that DOU are deprecated but are supposed to
behave the same way as ld, lo and lu.

However:
$ jot -w '%ld' 5 -2
-2
-1
0
1
2
$ jot -w '%D' 5 -2
4294967294
4294967295
0
1
2
$ jot -w '%ld' 4 4294967294 
4294967294
4294967295
4294967296
4294967297
$ jot -w '%D' 4 4294967294
jot: range error in conversion: 4294967294.000000

Similarly for %O and %U.

This makes %{D,O,U} synonymous with %l{d,o,u}:

Index: usr.bin/jot/jot.c
===================================================================
RCS file: /var/cvs/src/usr.bin/jot/jot.c,v
retrieving revision 1.36
diff -u -p -r1.36 jot.c
--- usr.bin/jot/jot.c   2 Sep 2016 14:23:09 -0000       1.36
+++ usr.bin/jot/jot.c   10 Dec 2017 14:26:47 -0000
@@ -420,12 +420,16 @@ getformat(void)
                        intdata = true;
                        break;
                case 'D':
+                       /* %lD is undefined */
                        if (!longdata) {
+                               longdata = true; /* %D behaves as %ld */
                                intdata = true;
                                break;
                        }
                case 'O': case 'U':
+                       /* %lO and %lU are undefined */
                        if (!longdata) {
+                               longdata = true; /* %O, %U behave as %ld, %lu */
                                intdata = nosign = true;
                                break;
                        }